I've owned a pair of Steiner predator 12x50's for over 4 years. They are my go-to binos. I used to guide full-time this time of year, and whether it's just because I'm good at spotting game, used to the landscape, or it's the glasses, but I ALWAYS see game before anyone else. Not boasting, just telling it like it is. I do believe these glasses and the special coating help. How much? When I figure out how to measure that I'll get back to you. One negative about the binos and Steiner CS: they come with these little plastic clips that snap into a channel on the body of the glasses to attach your harness to. Mine lasted a whole 3 months before breaking off, and trying to get replacements from Steiner proved futile. CS was terrible.
All the same, I rigged up a system of my own and still love these optics.